(;GM[1]FF[4]SZ[19]
GN[Solution 31-40]
PC[http://senseis.xmp.net/?MostDifficultProblemEver/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?MostDifficultProblemEver/Solution

Solution 31-40]
PL[B]

AB[ra][hb][lb][fc][lc][bd][ld][ce][de][fe][le][me][oe][pe][bf][mf][of][og][dh][oh][ph][qh][rh][sh][di][mi][ni][oi][pi][aj][fj][lj][mj][ak][ek][lk][qk][rk][sk][al][el][il][ll][ol][pl][ql][am][bm][em][lm][qm][rm][dn][fn][ln][mn][qn][co][fo][ko][no][oo][po][bp][cp][ep][np][pp][sp][fq][kq][lq][mq][pq][qq][sq][cr][nr][pr][sr][bs][ns][os][ps]
AW[qa][ib][jb][mb][rb][hc][qc][cd][jd][nd][od][ke][qe][re][df][ff][pf][bg][cg][dg][gg][hg][kg][lg][ng][ah][hi][ki][ri][si][bj][cj][jj][nj][oj][pj][qj][dk][jk][nk][ok][dl][jl][ml][nl][rl][sl][hm][jm][mm][om][sm][bn][cn][en][jn][nn][on][pn][rn][sn][mo][qo][ro][so][ap][hp][jp][kp][lp][mp][op][qp][rp][eq][oq][rq][ar][ir][kr][lr][mr][or][rr][ms][rs]
CR[oq]
LB[nq:a]

;B[jq]C[B31]MN[31]
;W[jr]C[W32]MN[32]
;B[iq]C[B33]MN[33]
;W[hq]C[W34]MN[34]
;B[gr]C[B35]MN[35]
;W[hr]C[W36]MN[36]
;B[ip]C[B37]MN[37]
;W[jo]C[W38]MN[38]
;B[io]C[B39]MN[39]
;W[ho]C[W40]MN[40]

;CR[oq]
LB[nq:a]
)
